问Java -使用SSH隧道连接到网页

EN

int assigned_port;   
    int local_port=3309;

    // Remote host and port
    int remote_port=3306;
    String remote_host = "<SSH host goes here>";
    String login = "<SSH login goes here>";
    String password = "<SSH password goes here>";

    try {
        JSch jsch = new JSch(); 

        // Create SSH session.  Port 22 is your SSH port which
        // is open in your firewall setup.
        Session session = jsch.getSession(login, remote_host, 22);
        session.setPassword(password);

        // Additional SSH options.  See your ssh_config manual for
        // more options.  Set options according to your requirements.
        java.util.Properties config = new java.util.Properties();
        config.put("StrictHostKeyChecking", "no");
        config.put("Compression", "yes");
        config.put("ConnectionAttempts","2");

        session.setConfig(config);

        // Connect
        session.connect();            

        // Create the tunnel through port forwarding.  
        // This is basically instructing jsch session to send 
        // data received from local_port in the local machine to 
        // remote_port of the remote_host
        // assigned_port is the port assigned by jsch for use,
        // it may not always be the same as
        // local_port.

        assigned_port = session.setPortForwardingL(local_port, 
                remote_host, remote_port);

    } catch (JSchException e) {            
        System.out.println("JSch:" + e.getMessage());
        return;
    }

    if (assigned_port == 0) {
        System.out.println("Port forwarding failed!"); 
        return;
    }